SqlConnection Conn = new SqlConnection(ConfigurationManager.ConnectionStrings["conn_ORATSB1"].ConnectionString);
SqlDataAdapter da = new SqlDataAdapter("select FIRST_NAME from TR_CONTACT WHERE CONTACT_ID='01'", Conn);
DataSet ds = new DataSet();
da.Fill(ds);
txt_ContactName.Text = Convert.ToString(ds.Tables[0].Rows[0][0]);